.~ Processes of treating materials by wave energy {6}
157.3
.~.~ Removing a component from normally gaseous mixture
DEFINITION
Classification: 204/157.3
Removing a component from normally gaseous mixture:
(under subclass 157.15) Subject matter in which an initial normally gaseous or vaporous mixture is treated by wave energy so as to remove therefrom by a chemical reaction or change to a different chemical form at least one of the components therein, resulting in a heterogeneous composition.
(1) Note. When the recovery of a definite chemical compound or element as a product is claimed, original classification of the patent is in subclass 157.4 or 157.6. However, where the claim does not include the step of separating the modified component, the patent is classified here even though the disclosed intent is to ultimately effect separation of the component.
(2) Note. The mixture need not be entirely gaseous. It may contain entrained solids or liquids. It must however be handled and distributed as a gas and must be in this form at the onset of the treatment.
(3) Note. Methods of purifying a gaseous composition so as to perfect said remaining composition for a particular art use are classified with the art use.
SEE OR SEARCH CLASS
95, Gas Separation: Processes, appropriate subclasses, for processes of purifying a gaseous mixture or separating a constituent therefrom where no chemical reaction is involved in the separation or purification, per se.
423, Chemistry of Inorganic Compounds,
210+, for processes of purifying a gaseous mixture or separating constituent therefrom involving a chemical reaction where the claim does not include the step of separating the modified component and the appropriate compound subclasses 249 - 658 when the claim does include such step.
